function ajaxForJson(targetUrl, paramData, callback){
	$.ajax({
		url:targetUrl,
		data : paramData,
		method:"post",
		dataType:"json",
		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
		success : function(data){
			callback(data);
		},
		error : function(request, status, error){
			
		}
	});
}
